This may be Joseph and Marys Christenings given they name their Ist 2 Sons Joseph/Isaac;
JOSEPH Nanson, 28 November 1763, St Cuthbert, Carlisle, Father JOSEPH Nanson
** possible Sibling MARY who married Robert LAMB;
MARY Nanson, 2 Dec 1783, Parents JOSEPH/MARY
Mary NANSON Married Robert LAMB, 15 July 1804, St Cuthbert
(F/S. Org)
MARY Fell, 26 Jan 1758, St Mary, Holm Cultram, Father ISAAC Fell
Sibling;
MARTHA 16 Nov 1750
Isaac FELL Married Mary BROUGH 17 Aug 1749 same Church
(Source FreeREG)